20400501431 has 8 divisors (see below), whose sum is σ = 20485294944. Its totient is φ = 20315750400.

The previous prime is 20400501427. The next prime is 20400501437. The reversal of 20400501431 is 13410500402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20400501431 - 2² = 20400501427 is a prime.

It is a super-2 number, since 2×20400501431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20400501437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1264391 + ... + 1280423.

It is an arithmetic number, because the mean of its divisors is an integer number (2560661868).

Almost surely, 2^20400501431 is an apocalyptic number.

20400501431 is a deficient number, since it is larger than the sum of its proper divisors (84793513).

20400501431 is a wasteful number, since it uses less digits than its factorization.

20400501431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21241.

The product of its (nonzero) digits is 480, while the sum is 20.

The spelling of 20400501431 in words is "twenty billion, four hundred million, five hundred one thousand, four hundred thirty-one".